Short Term Improvements:
*Brawny Adargas: DMG:+35 Delay:+54 STR+7 DEX+5
Physical damage taken -5% LV 99 MNK PUP
-Instant base damage boost over taurine, only loses 1 STR, +5 dex for your WS mod, and a little extra PDT during TP phase never hurt anyone. As far as AH weapons go, these really aren't half bad.
*Rajas Ring: See Rearden's comment above ^
As far as your WS set goes; here is my SS for Attack Uncapped
(Would use Myrmex mittens if I had them)
-So, short term goals here include the torque and belt. Athos's feet are also an upgrade over what you are currently using, but are easier to obtain than Thaumas. Kirin's Osode is also an upgrade over Loki's assuming fSTR is uncapped and assuming that sTP+7 doesn't somehow save you a swing for your next WS round (haven't ever calculated if it does).
For more potential gear, here is my attack capped set.
There is a +5 DEX neck AH option, and also a +5 DEX back AH option that are good to start with since they end up being ~3M cheaper altogether. Artful belt+1 (10 dex), or the NQ artful belt until you get Wanion.
Remember: Capping acc is the #1 priority once you have capped gear haste to 25 or 26% imo. Missed hits can't crit, mised hits don't give TP. After that, for WS's it becomes a combination of choosing which items will provide the most attack/WS mods/STR overall. For instance, when attack is uncapped--justiciar's wins, even though it does not have any DEX on it whatsoever. The only time you will ever likely be capped on acc AND attack are zerg situations with multiple minuets/rolls. If you already know all of this then I certainly apologize if this is coming off as being overly simplistic; I just didn't want to post an "attack uncapped" and an "attack capped" set and leave you to the wind when in reality combinations of gear from both sets are often used depending on the situations.
*The Shantotto Accession legs (-4% PDT, +7 evasion) are a really nice piece to add to your PDT set, and are easy as balls to get.
Long Term Improvements:
*If you refuse to go after relic or emp, then I would recommend the WoE "Victory Smite" H2H.
*Toci's harness, as you stated
*Thaumas: Acquire in this order- Body > Feet > Hands, if you are ONLY concerned with spiral, but if you end up making the WoE smite h2h then I would go Body > Legs > Feet. Of course, if you end up getting the WoE smite h2h then then all of these gear sets become completely different. If you want to see what I'm using for smite--they're in my item sets.
Best of luck, and have fun.